Cita APA (7th ed.)

Batty, D. (1992). An introduction to the twentieth edition of the Dewey decimal classification. Library Association.

Cita Chicago (17th ed.)

Batty, David. An Introduction to the Twentieth Edition of the Dewey Decimal Classification. London: Library Association, 1992.

Cita MLA (9th ed.)

Batty, David. An Introduction to the Twentieth Edition of the Dewey Decimal Classification. Library Association, 1992.